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import React from 'react';
import { renderToString } from 'react-dom/server';
import { useForm } from '../useForm';
describe('useForm with SSR', () => {
it('should not output error', () => {
const Component = () => {
const { register } = useForm<{
test: string;
}>();
return (
<div>
<input {...register('test')} />
</div>
);
};
const spy = jest.spyOn(console, 'error');
expect(renderToString(<Component />)).toEqual(
'<div><input name="test"/></div>',
);
expect(spy).not.toHaveBeenCalled();
});
it('should display error with errors prop', () => {
const App = () => {
const {
register,
formState: { errors },
} = useForm<{
test: string;
}>({
errors: {
test: { type: 'test', message: 'test error' },
},
});
return (
<div>
<input {...register('test')} />
<span role="alert">{errors.test && errors.test.message}</span>
</div>
);
};
expect(renderToString(<App />)).toEqual(
'<div><input name="test"/><span role="alert">test error</span></div>',
);
});
it('should not pass down constrained API for server side rendering', () => {
const App = () => {
const { register } = useForm<{
test: string;
}>();
return (
<div>
<input
{...register('test', {
required: true,
min: 2,
max: 2,
maxLength: 2,
minLength: 2,
})}
/>
</div>
);
};
expect(renderToString(<App />)).toEqual('<div><input name="test"/></div>');
});
it('should pass down constrained API for server side rendering', () => {
const App = () => {
const { register } = useForm<{
test: string;
}>({
shouldUseNativeValidation: true,
});
return (
<div>
<input
{...register('test', {
required: true,
min: 2,
max: 2,
maxLength: 2,
minLength: 2,
})}
/>
</div>
);
};
expect(renderToString(<App />)).toEqual('<div><input name="test"/></div>');
});
it('should support progress enhancement for form', () => {
const App = () => {
const { register } = useForm<{
test: string;
}>({
progressive: true,
});
return (
<div>
<input
{...register('test', {
required: true,
min: 2,
max: 2,
maxLength: 2,
minLength: 2,
})}
/>
</div>
);
};
expect(renderToString(<App />)).toEqual(
'<div><input required="" min="2" max="2" minLength="2" maxLength="2" name="test"/></div>',
);
});
});
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